William mcshane



W. MGSHANE. INJBGTOR.

110.431,613. Patented Ju1y 1890.

.N f C www' UNITED STATES PATENT OFFICE.

WILLIAM MCSl-IANE, OF ST. JOHN, NEI/V BRUNSIVICK, CANADA, ASSIGNOR TO THOMAS MCAVITY, JOHN MCAVITY, AND GEORGE MCAVITY, OF

SAME PLACE.

|NJ EcTo R.

SPECIFICATION forming part of Letters Patent No. 431,613, dated July 8,1890.

' Application filed March 26, 1890. Serial No. 345,343. l (Model.)

To all whom t may concern:

Be it known that I, VILLIAM MCSHANE, a subject of the Queen of Great Britain, residing in St. John, county of St. John, Province of New Brunswick, and Dominion of Canada,

have invented certain new and useful Im-- proveniente in Injectors, of which the following is a specification.

My invention relates generally to injectors,

and particularly to that class thereof known.

and more efficient and convenient in its operation.

With this object in view my invention consists in providing a double-tube injector having overflow and discharge passages with an additional passage communicating` with the forcer-tube and overflow-passage, and the tubular two-way cock establishing s aid com-V munication.

My invention consists, further, in certain details of construction and combination of parts, such as shown in the drawings and setforth in the description.

In the accompanying drawings, Figure lis a vertical longitudinal section of my improved injector. Fig. 2 is a transverse vertical section taken on the plane of the line 2 2 of Fig. 1; and Fig. 3 is a detail View of the washer, lug, and connecting-rod.

In the embodiment of my invention I employ a casing A, containing lifting and forcing appliances, said casing being connected with the steam and water supplies by means of the pipes S and W, respectively. The overiow passage D and the discharge-passage E are preferably formed integral with the casing of the injector.

The lifting apparatus consists, as usual, of the steam-chamber S", lifter steam-nozzle a, and the lifter combining-tube b, and the forcing apparatus consists of the forcer steamnozzle c, forcer combining-tube d, and the steam-chamber communicates also with this apparatus. The lifting and forcing devices are connected by means of the horizontal chamber J and the vertical chamber 0.' All of the said parts for lifting and forcing the Water may be of any approved pattern; but it is preferred to employ constructions at least somewhat similar to those shown in my patent, N o. 362,300, dated May 3, 1887.

Directly beneath the forcer combining-tube is formed the passage C, which curves 0E in its downward course and joins the dischargepassage E. At the juncture of the chambers J and C is formed an additional passageB, said passage extending downward and communicating with the passages C, D, and E by -means of the two-way tubular cock or plug F,

arranged in the casing at the juncture of the passages B and C and the overiioW-passage D. The passage B is preferably larger at its upper extremity.

The operating-lever F is secured upon one end ofthe plug F, said lever being provided with a lug F, which engages a stop F", formed upon the casing, to limit the movement of the lever. A washer H is arranged upon the opposite end of the plug, said Washer having the eccentric lug H', slotted 4as shown at I-I in Fig. 3. The connecting-rod G is secured at its lower end tothe eccentric lug by means of the screw or bolt I Working in the slot of the said lug. The upper end of the connecting-rod is rigidly connected with the valve-spindle K, which operates thevalve L, to close and open the same in concert with the opening andA closing of the plug F.

The construction of my improved injector having been fully described, I will now describe its operation.

IVe will suppose the steam and water passages to be open. In this class of injectors it is necessary to have a communication between the lifter side of the injector and the external atmosphere. This communication is had directly with the air by means of. the passage B the pipe W and forced into the chamber J,

Where it immediatelyiows into the passage B through the'tWo-Way cock F and out through the overflow-passage D. The lever F is now shifted until the lu g F comes in contact with the stop F", Which limits its movements and renders its action positive and certain. The cock in being so turned operates the connecting-rod G and opens the valve L, when the forcer side of the injector is set into operation.

I am aware that passages have been made communicating with the forcer side of the injector and the overiow, and that valves have been employed to regulate said passage; but in all 'of these devices, so far as I am aware, there is a very complicated arrangement of valves, rendering the device expensive, difficult in its operation, and greatly impairing its efficiency, Whereas in my improved injector the two-Way cock is much simpler, cheaper, andvmore eicient than a complicated set of levers. The lever being provided with the stop limits the motion of the same, and the slotted lug on the Washer, to Which the connecting-rod is attached, insures a positive vertical movement of said rod.

Having thus described my invention, its operation, and advantages, what I claim as new IIS-"- ll. An improved injector consisting of al double tube-casing A, having the overflow D,

rod G, and valve-spindle K, operating the valve L, all arranged so that when the cock F is open the valve is closed, and vice versa, substantially as shovvnfand described.

v2. An improved injector consisting of the double-tube casing A, having the overflow D, discharge E, and passage B, leading from the forcer side of the injector to the overt-low, the tWo-Way cock F, establishing communication between the passage B, overflow D, and discharge E, the lever F', for operating the said cock, said lever having the lug F adapted to contact with the stop F the Washer H upon one end of the cock, the eccentric lug H formed upon the Washer and slotted at I-I", the connecting-rod G, and means for connecting 4the same to the` eccentric lug, the steamvalve L, and spindle K, all arranged so that when the valve L is opened the cock F is closed, and vice versa, substantially as and for the purpose set forth.

WILLIAM MCSHANE. 

